Top 5 chemistry relics

1.

Draft for the first version of the periodic table, February 17, 1869

Dmitriy Ivanovich Mendeleyev

Oesper Collection, University of Cincinnati, USA

2.

Models of assymmetric molecules, 1874

Jacobus Hendricus van ‘t Hoff

Museum Boerhaave in Leiden, the Netherlands

3.
"Photo 51" Sodium deoxyribose nucleate from calf thymus, Structure B, May 2, 1952

Rosalind Elsie Franklin and Raymond Gosling

Oregon State University's Special Collections, USA

4.
Mercury gasometer, used to identify chemical properties of oxygen, 1774

Antoine Laurent Lavoisier

Musée des arts et métiers - Cnam, Paris, France

5.
Original botlle of mauve dye, 1856

Sir William Henry Perkin

Science Museum London, UK
This sample is most likely not the real first sample; "it cannot be earlier than 1862"